./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 53d53b1526e829d58326d87a7aff591d9debe20f ........................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 53d53b1526e829d58326d87a7aff591d9debe20f ....................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:10:47,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:10:47,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:10:47,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:10:47,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:10:47,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:10:47,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:10:47,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:10:47,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:10:47,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:10:47,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:10:47,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:10:47,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:10:47,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:10:47,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:10:47,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:10:47,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:10:47,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:10:47,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:10:47,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:10:47,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:10:47,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:10:47,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:10:47,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:10:47,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:10:47,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:10:47,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:10:47,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:10:47,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:10:47,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:10:47,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:10:47,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:10:47,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:10:47,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:10:47,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:10:47,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:10:47,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:10:47,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:10:47,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:10:47,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:10:47,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:10:47,488 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:10:47,544 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:10:47,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:10:47,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:10:47,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:10:47,549 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:10:47,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:10:47,550 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:10:47,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:10:47,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:10:47,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:10:47,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:10:47,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:10:47,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:10:47,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:10:47,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:10:47,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:10:47,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:10:47,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:10:47,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:10:47,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:10:47,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:10:47,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:10:47,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:10:47,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:10:47,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:10:47,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:10:47,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:10:47,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:10:47,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:10:47,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2020-11-30 00:10:47,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:10:47,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:10:47,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:10:47,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:10:47,906 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:10:47,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-11-30 00:10:48,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/f9d887b00/f4296142ef5c4b2f8da05c0030554160/FLAG661cb9322 [2020-11-30 00:10:48,551 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:10:48,552 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-11-30 00:10:48,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/f9d887b00/f4296142ef5c4b2f8da05c0030554160/FLAG661cb9322 [2020-11-30 00:10:48,905 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/f9d887b00/f4296142ef5c4b2f8da05c0030554160 [2020-11-30 00:10:48,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:10:48,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:10:48,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:10:48,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:10:48,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:10:48,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:10:48" (1/1) ... [2020-11-30 00:10:48,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af7ecc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:48, skipping insertion in model container [2020-11-30 00:10:48,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:10:48" (1/1) ... [2020-11-30 00:10:48,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:10:48,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:10:49,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:10:49,211 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:10:49,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:10:49,254 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:10:49,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49 WrapperNode [2020-11-30 00:10:49,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:10:49,263 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:10:49,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:10:49,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:10:49,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:10:49,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:10:49,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:10:49,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:10:49,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... [2020-11-30 00:10:49,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:10:49,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:10:49,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:10:49,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:10:49,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:10:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:10:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:10:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:10:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:10:49,829 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:10:49,829 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 00:10:49,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:49 BoogieIcfgContainer [2020-11-30 00:10:49,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:10:49,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:10:49,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:10:49,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:10:49,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:10:48" (1/3) ... [2020-11-30 00:10:49,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28393220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:10:49, skipping insertion in model container [2020-11-30 00:10:49,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:49" (2/3) ... [2020-11-30 00:10:49,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28393220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:10:49, skipping insertion in model container [2020-11-30 00:10:49,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:49" (3/3) ... [2020-11-30 00:10:49,865 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-11-30 00:10:49,886 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:10:49,894 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:10:49,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:10:49,941 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:10:49,942 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:10:49,942 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:10:49,942 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:10:49,942 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:10:49,943 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:10:49,943 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:10:49,943 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:10:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-30 00:10:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 00:10:49,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:10:49,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:10:49,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:10:49,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:10:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-11-30 00:10:49,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:10:49,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323062366] [2020-11-30 00:10:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:10:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:10:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:10:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323062366] [2020-11-30 00:10:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:10:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:10:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221157077] [2020-11-30 00:10:50,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 00:10:50,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:10:50,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 00:10:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:10:50,262 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-30 00:10:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:10:50,281 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 00:10:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:10:50,283 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 00:10:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:10:50,302 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:10:50,302 INFO L226 Difference]: Without dead ends: 7 [2020-11-30 00:10:50,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:10:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-30 00:10:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 00:10:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:10:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-30 00:10:50,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-30 00:10:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:10:50,354 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-30 00:10:50,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 00:10:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-30 00:10:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 00:10:50,357 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:10:50,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:10:50,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:10:50,358 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:10:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:10:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-11-30 00:10:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:10:50,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469377559] [2020-11-30 00:10:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:10:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:10:50,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:10:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:10:50,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:10:50,501 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:10:50,504 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:10:50,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:10:50,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:10:50 BoogieIcfgContainer [2020-11-30 00:10:50,555 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:10:50,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:10:50,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:10:50,556 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:10:50,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:49" (3/4) ... [2020-11-30 00:10:50,562 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:10:50,563 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:10:50,565 INFO L168 Benchmark]: Toolchain (without parser) took 1653.04 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 54.7 MB in the beginning and 87.4 MB in the end (delta: -32.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:50,567 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:50,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.55 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 64.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:50,569 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 86.0 MB. Free memory was 64.1 MB in the beginning and 62.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:50,569 INFO L168 Benchmark]: Boogie Preprocessor took 24.70 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 61.6 MB in the end (delta: 827.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:50,570 INFO L168 Benchmark]: RCFGBuilder took 490.11 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 50.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:50,571 INFO L168 Benchmark]: TraceAbstraction took 700.73 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 50.4 MB in the beginning and 87.4 MB in the end (delta: -37.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:50,572 INFO L168 Benchmark]: Witness Printer took 7.17 ms. Allocated memory is still 109.1 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:50,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.55 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 64.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.41 ms. Allocated memory is still 86.0 MB. Free memory was 64.1 MB in the beginning and 62.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.70 ms. Allocated memory is still 86.0 MB. Free memory was 62.4 MB in the beginning and 61.6 MB in the end (delta: 827.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 490.11 ms. Allocated memory is still 86.0 MB. Free memory was 61.6 MB in the beginning and 50.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 700.73 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 50.4 MB in the beginning and 87.4 MB in the end (delta: -37.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. * Witness Printer took 7.17 ms. Allocated memory is still 109.1 MB. Free memory is still 87.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:10:53,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:10:53,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:10:53,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:10:53,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:10:53,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:10:53,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:10:53,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:10:53,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:10:53,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:10:53,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:10:53,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:10:53,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:10:53,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:10:53,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:10:53,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:10:53,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:10:53,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:10:53,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:10:53,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:10:53,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:10:53,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:10:53,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:10:53,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:10:53,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:10:53,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:10:53,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:10:53,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:10:53,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:10:53,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:10:53,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:10:53,990 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:10:53,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:10:53,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:10:53,995 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:10:53,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:10:53,996 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:10:53,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:10:53,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:10:53,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:10:54,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:10:54,001 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-30 00:10:54,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:10:54,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:10:54,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:10:54,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:10:54,061 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:10:54,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:10:54,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:10:54,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:10:54,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:10:54,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:10:54,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:10:54,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:10:54,063 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 00:10:54,063 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 00:10:54,063 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:10:54,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:10:54,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:10:54,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:10:54,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:10:54,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:10:54,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:10:54,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:10:54,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:10:54,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:10:54,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:10:54,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:10:54,072 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-30 00:10:54,073 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 00:10:54,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:10:54,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:10:54,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 00:10:54,075 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2020-11-30 00:10:54,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:10:54,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:10:54,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:10:54,654 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:10:54,655 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:10:54,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-11-30 00:10:54,737 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/d84712206/37f4b8c45951418aa7f4779b55e7d24b/FLAG93eeafc3b [2020-11-30 00:10:55,388 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:10:55,389 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-11-30 00:10:55,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/d84712206/37f4b8c45951418aa7f4779b55e7d24b/FLAG93eeafc3b [2020-11-30 00:10:55,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/data/d84712206/37f4b8c45951418aa7f4779b55e7d24b [2020-11-30 00:10:55,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:10:55,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:10:55,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:10:55,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:10:55,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:10:55,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:10:55" (1/1) ... [2020-11-30 00:10:55,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0da941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:55, skipping insertion in model container [2020-11-30 00:10:55,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:10:55" (1/1) ... [2020-11-30 00:10:55,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:10:55,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:10:56,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:10:56,112 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:10:56,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:10:56,165 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:10:56,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56 WrapperNode [2020-11-30 00:10:56,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:10:56,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:10:56,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:10:56,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:10:56,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:10:56,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:10:56,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:10:56,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:10:56,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... [2020-11-30 00:10:56,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:10:56,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:10:56,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:10:56,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:10:56,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:10:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 00:10:56,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:10:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:10:56,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:10:57,591 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:10:57,592 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 00:10:57,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:57 BoogieIcfgContainer [2020-11-30 00:10:57,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:10:57,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:10:57,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:10:57,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:10:57,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:10:55" (1/3) ... [2020-11-30 00:10:57,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b2bcab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:10:57, skipping insertion in model container [2020-11-30 00:10:57,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:10:56" (2/3) ... [2020-11-30 00:10:57,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b2bcab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:10:57, skipping insertion in model container [2020-11-30 00:10:57,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:57" (3/3) ... [2020-11-30 00:10:57,631 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-11-30 00:10:57,645 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:10:57,650 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:10:57,665 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:10:57,696 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:10:57,713 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:10:57,713 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:10:57,713 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:10:57,713 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:10:57,714 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:10:57,714 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:10:57,714 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:10:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-30 00:10:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 00:10:57,750 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:10:57,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:10:57,752 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:10:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:10:57,764 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-11-30 00:10:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 00:10:57,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407112814] [2020-11-30 00:10:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 00:10:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:10:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 00:10:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:10:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:10:58,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 00:10:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:10:58,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407112814] [2020-11-30 00:10:58,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:10:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 00:10:58,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762039226] [2020-11-30 00:10:58,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 00:10:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-30 00:10:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 00:10:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:10:58,138 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-30 00:10:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:10:58,160 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 00:10:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:10:58,162 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 00:10:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:10:58,178 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:10:58,178 INFO L226 Difference]: Without dead ends: 7 [2020-11-30 00:10:58,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:10:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-30 00:10:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-30 00:10:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 00:10:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-11-30 00:10:58,224 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-11-30 00:10:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:10:58,225 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-11-30 00:10:58,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 00:10:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-11-30 00:10:58,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 00:10:58,227 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:10:58,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:10:58,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 00:10:58,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:10:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:10:58,453 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-11-30 00:10:58,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 00:10:58,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752028836] [2020-11-30 00:10:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 00:10:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:10:58,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:10:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:10:58,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:10:58,822 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-30 00:10:58,823 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:10:59,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 00:10:59,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:10:59 BoogieIcfgContainer [2020-11-30 00:10:59,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:10:59,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:10:59,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:10:59,059 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:10:59,060 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:10:57" (3/4) ... [2020-11-30 00:10:59,063 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:10:59,123 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_34a573b6-f5fd-4f76-8149-0beeeb89cbf4/bin/uautomizer/witness.graphml [2020-11-30 00:10:59,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:10:59,126 INFO L168 Benchmark]: Toolchain (without parser) took 3360.60 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 37.3 MB in the beginning and 46.2 MB in the end (delta: -8.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,127 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:59,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.23 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 27.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.69 ms. Allocated memory is still 58.7 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:10:59,135 INFO L168 Benchmark]: Boogie Preprocessor took 68.23 ms. Allocated memory is still 58.7 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,136 INFO L168 Benchmark]: RCFGBuilder took 1308.59 ms. Allocated memory is still 58.7 MB. Free memory was 24.5 MB in the beginning and 34.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,141 INFO L168 Benchmark]: TraceAbstraction took 1449.43 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.1 MB in the beginning and 47.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,142 INFO L168 Benchmark]: Witness Printer took 65.14 ms. Allocated memory is still 77.6 MB. Free memory was 47.9 MB in the beginning and 46.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:10:59,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.23 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 27.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.69 ms. Allocated memory is still 58.7 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.23 ms. Allocated memory is still 58.7 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1308.59 ms. Allocated memory is still 58.7 MB. Free memory was 24.5 MB in the beginning and 34.6 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1449.43 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 34.1 MB in the beginning and 47.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Witness Printer took 65.14 ms. Allocated memory is still 77.6 MB. Free memory was 47.9 MB in the beginning and 46.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...